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- PDB-2e7q: Crystal structure of basic winged bean lectin in complex with b b... -

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Basic information

Entry
Database: PDB / ID: 2e7q
TitleCrystal structure of basic winged bean lectin in complex with b blood group trisaccharide
ComponentsBasic agglutinin
KeywordsSUGAR BINDING PROTEIN / WINGED BEAN / JELLY ROLL
Function / homology
Function and homology information


carbohydrate binding
Similarity search - Function
Legume lectin / Legume lectins beta-chain signature. / Legume lectin domain / Legume lectin, beta chain, Mn/Ca-binding site / Legume lectin domain / Jelly Rolls - #200 / Concanavalin A-like lectin/glucanase domain superfamily / Jelly Rolls / Sandwich / Mainly Beta
Similarity search - Domain/homology
: / Basic agglutinin
Similarity search - Component
Biological speciesPsophocarpus tetragonolobus (winged bean)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.75 Å
AuthorsKulkarni, K.A. / Katiyar, S. / Surolia, A. / Vijayan, M. / Suguna, K.
Citation
Journal: Proteins / Year: 2007
Title: Generation of blood group specificity: New insights from structural studies on the complexes of A- and B-reactive saccharides with basic winged bean agglutinin
Authors: Kulkarni, K.A. / Katiyar, S. / Surolia, A. / Vijayan, M. / Suguna, K.
#1: Journal: ACTA CRYSTALLOGR.,SECT.D / Year: 2006
Title: Structural basis for the carbohydrate-specificity of basic winged-bean lectin and its differential affinity for Gal and GalNAc
Authors: Kulkarni, K.A. / Katiyar, S. / Surolia, A. / Vijayan, M. / Suguna, K.
#2: Journal: J.Mol.Biol. / Year: 1998
Title: Carbohydrate specificity and quaternary association in basic winged bean lectin: X-ray analysis of the lectin at 2.5 A resolution
Authors: Prabu, M.M. / Sankaranarayanan, R. / Puri, K.D. / Sharma, V. / Surolia, A. / Vijayan, M. / Suguna, K.
History
DepositionJan 12, 2007Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jun 19, 2007Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Non-polymer description / Version format compliance
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_struct_special_symmetry / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_struct_special_symmetry.label_asym_id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Oct 25, 2023Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Basic agglutinin
B: Basic agglutinin
C: Basic agglutinin
D: Basic agglutinin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)110,36823
Polymers104,0564
Non-polymers6,31219
Water4,216234
1
A: Basic agglutinin
B: Basic agglutinin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)55,50912
Polymers52,0282
Non-polymers3,48110
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
C: Basic agglutinin
D: Basic agglutinin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)54,85911
Polymers52,0282
Non-polymers2,8309
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)157.410, 90.545, 73.324
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Space group name H-MP21212
Components on special symmetry positions
IDModelComponents
11C-2338-

HOH

21D-3324-

HOH

DetailsIT IS A HOMO-DIMER. IN THE ASYMMETRIC UNIT THERE ARE TWO MOLECULES WITH CHAINS A&B AND C&D, FORMING TWO DIMERS.

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Components

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Protein , 1 types, 4 molecules ABCD

#1: Protein
Basic agglutinin / WBA I / Legume Lectin


Mass: 26014.109 Da / Num. of mol.: 4 / Fragment: UNP residues 2-238 / Source method: isolated from a natural source / Source: (natural) Psophocarpus tetragonolobus (winged bean) / References: UniProt: O24313

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Sugars , 4 types, 11 molecules

#2: Polysaccharide
alpha-L-fucopyranose-(1-3)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)]2-acetamido-2-deoxy-beta- ...alpha-L-fucopyranose-(1-3)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 570.542 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
LFucpa1-3[DGlcpNAcb1-4]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1221m-1a_1-5]/1-2-1/a3-b1_a4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(3+1)][a-L-Fucp]{}[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#3: Polysaccharide alpha-D-galactopyranose-(1-3)-beta-D-galactopyranose-(1-4)-alpha-D-glucopyranose


Type: oligosaccharide / Mass: 504.438 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGalpa1-3DGalpb1-4DGlcpa1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,3,2/[a2122h-1a_1-5][a2112h-1b_1-5][a2112h-1a_1-5]/1-2-3/a4-b1_b3-c1WURCSPDB2Glycan 1.1.0
[][a-D-Glcp]{[(4+1)][b-D-Galp]{[(3+1)][a-D-Galp]{}}}LINUCSPDB-CARE
#4: Polysaccharide alpha-L-fucopyranose-(1-3)-[2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-4)]2-acetamido-2-deoxy- ...alpha-L-fucopyranose-(1-3)-[2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-4)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 570.542 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
LFucpa1-3[DGlcpNAca1-4]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/3,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1221m-1a_1-5][a2122h-1a_1-5_2*NCC/3=O]/1-2-3/a3-b1_a4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(3+1)][a-L-Fucp]{}[(4+1)][a-D-GlcpNAc]{}}}LINUCSPDB-CARE
#5: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE

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Non-polymers , 3 types, 242 molecules

#6: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Ca
#7: Chemical
ChemComp-MN / MANGANESE (II) ION


Mass: 54.938 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mn
#8: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 234 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.51 Å3/Da / Density % sol: 50.98 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 7.05
Details: 6-7%(w/v) PEG 6000, 10%(v/v) isopropenol, 20mM PBS, pH 7.05, VAPOR DIFFUSION, HANGING DROP, temperature 293K

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Data collection

DiffractionMean temperature: 293 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU300 / Wavelength: 1.548 Å
DetectorType: MAR scanner 345 mm plate / Detector: IMAGE PLATE
RadiationMonochromator: OSMIC MIRRORS / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.548 Å / Relative weight: 1
ReflectionResolution: 2.75→30 Å / Num. obs: 27614 / % possible obs: 96.9 % / Redundancy: 3.3 % / Biso Wilson estimate: 64.9 Å2 / Rmerge(I) obs: 0.131 / Net I/σ(I): 12.7
Reflection shellResolution: 2.75→2.85 Å / Redundancy: 2.1 % / Rmerge(I) obs: 0.5 / Mean I/σ(I) obs: 2.1 / % possible all: 92.5

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Processing

Software
NameVersionClassification
CNS1.1refinement
MAR345dtbdata collection
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB RNTRY 1WBL

1wbl


Resolution: 2.75→29.74 Å / Rfactor Rfree error: 0.008 / Data cutoff high absF: 2119417.36 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0
Details: crystals were isomorphous to 1wbl. therefore, the protein atoms from this structure were directly taken for the refinement.
RfactorNum. reflection% reflectionSelection details
Rfree0.258 1061 3.9 %RANDOM
Rwork0.198 ---
obs0.198 27152 97.1 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 36.8891 Å2 / ksol: 0.293828 e/Å3
Displacement parametersBiso mean: 32.7 Å2
Baniso -1Baniso -2Baniso -3
1--5.57 Å20 Å20 Å2
2--15.35 Å20 Å2
3----9.77 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.4 Å0.3 Å
Luzzati d res low-5 Å
Luzzati sigma a0.56 Å0.43 Å
Refinement stepCycle: LAST / Resolution: 2.75→29.74 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms7270 0 404 234 7908
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.008
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg1.5
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d26.3
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d1.06
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it1.161.5
X-RAY DIFFRACTIONc_mcangle_it1.992
X-RAY DIFFRACTIONc_scbond_it1.742
X-RAY DIFFRACTIONc_scangle_it2.732.5
LS refinement shellResolution: 2.75→2.85 Å / Rfactor Rfree error: 0.038 / Total num. of bins used: 10
RfactorNum. reflection% reflection
Rfree0.387 106 4.1 %
Rwork0.301 2469 -
obs--93.4 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2carbohydrate.paramcarbohydrate.top
X-RAY DIFFRACTION3ion.paramion.top
X-RAY DIFFRACTION4water.paramwater.top
X-RAY DIFFRACTION5cis_pep.param

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